The triangles are matched as follows
Triangle CFE is a right angle triangle
Triangle BEC is a scalene triangle
Triangle BFG is an equilateral triangle
Triangle GAF is an isosceles triangle
What is right triangle
This is a triangle that has one of the interior angles equal to 90 degrees
Scalene triangle is a triangle that no measure of the side is equal to the other.
When a triangle has two of the sides equal to each other we have isosceles triangle. In a case where all the three sides are equal the triangle is called equilateral triangle.